diff --git a/CHANGELOG.md b/CHANGELOG.md
index bdd082a1c..f026b97fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,7 @@
 - Fix: コードエディタが正しく表示されない問題を修正
 - Fix: プロフィールの「ファイル」にセンシティブな画像がある際のデザインを修正
 - Fix: 一度に大量の通知が入った際に通知音が音割れする問題を修正
+- Fix: 通知のグルーピング設定を変更してもリロードされるまで表示が変わらない問題を修正 #12470
 
 ### Server
 - Enhance: MFM `$[ruby ]` が他ソフトウェアと連合されるように
diff --git a/packages/frontend/src/components/MkNotifications.vue b/packages/frontend/src/components/MkNotifications.vue
index 7b072fa49..2a0082204 100644
--- a/packages/frontend/src/components/MkNotifications.vue
+++ b/packages/frontend/src/components/MkNotifications.vue
@@ -24,7 +24,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { onUnmounted, onDeactivated, onMounted, computed, shallowRef, onActivated } from 'vue';
+import { onUnmounted, onDeactivated, onMounted, computed, shallowRef, onActivated, watch } from 'vue';
 import MkPagination, { Paging } from '@/components/MkPagination.vue';
 import XNotification from '@/components/MkNotification.vue';
 import MkDateSeparatedList from '@/components/MkDateSeparatedList.vue';
@@ -43,7 +43,7 @@ const props = defineProps<{
 
 const pagingComponent = shallowRef<InstanceType<typeof MkPagination>>();
 
-const pagination: Paging = defaultStore.state.useGroupedNotifications ? {
+let pagination = $computed(() => defaultStore.reactiveState.useGroupedNotifications.value ? {
 	endpoint: 'i/notifications-grouped' as const,
 	limit: 20,
 	params: computed(() => ({
@@ -55,7 +55,7 @@ const pagination: Paging = defaultStore.state.useGroupedNotifications ? {
 	params: computed(() => ({
 		excludeTypes: props.excludeTypes ?? undefined,
 	})),
-};
+});
 
 function onNotification(notification) {
 	const isMuted = props.excludeTypes ? props.excludeTypes.includes(notification.type) : false;
diff --git a/packages/frontend/src/components/MkPagination.vue b/packages/frontend/src/components/MkPagination.vue
index e7796dfcb..2c59e6d4e 100644
--- a/packages/frontend/src/components/MkPagination.vue
+++ b/packages/frontend/src/components/MkPagination.vue
@@ -186,7 +186,7 @@ watch([$$(backed), $$(contentEl)], () => {
 });
 
 // パラメータに何らかの変更があった際、再読込したい（チャンネル等のIDが変わったなど）
-watch(() => props.pagination.params, init, { deep: true });
+watch(() => [props.pagination.endpoint, props.pagination.params], init, { deep: true });
 
 watch(queue, (a, b) => {
 	if (a.size === 0 && b.size === 0) return;